function lunch_encode(){
  //look for all email class in the HTML TREE
  var arr_tag = document.getElementsByTagName('a');
  for(x=0; x < arr_tag.length; x++){
  	if(arr_tag[x].className == 'email'){
  		arr_tag[x].innerHTML = 	email_encode(arr_tag[x].innerHTML);
  		arr_tag[x].href = email_encode(arr_tag[x].href);
  	}
  }
}

function email_encode(to_encode){
	//string to remplace	
	to_encode  = to_encode.replace("_at_", "@");
	to_encode  = to_encode.replace("_dot_", ".");
	return(to_encode);
}